To copy the color or line style from one object ("From") to another ("To"), follow these steps:
1) Select the object with the property you want to copy (the "From" object). The color and line styles of that object will be displayed.
2) Hold down Ctrl and Alt and click near a corner of the "To" object. This will add the "To" object to the selection. (If you want to change more than one object, hold down Ctrl, and click and drag a selection rectangle around the "To" objects.
3) Now, reselect the color or line style already shown.